Vo2 Max Test Lab Report

1. Both of the subjects in this test preformed excellent compared to the rankings provided. Victors Mean Power put him in between the 85 to 90 percentile with his score of 639.83 and his Anaerobic Capacity put him in between the 60 to 65 percentile. These scores indicate that Victor trains more with resistance than aerobic type exercises because of the high score of his Mean Power. These scores also correlate with his VO2 Max test we preformed earlier. His VO2 Max of 3.4 is low compared to the high end of the spectrum for that test and indicated that Victor focuses more on resistance than aerobic. Terry’s score put him in between the 70 to 75 percentile in Mean Power but put him in the 95th percentile for Anaerobic Capacity. This is due to his higher level of fitness and his lower body weight compared to Victor.
2. These results provide a great insight into each of the subject’s ATP-PCr and lactic acid
energy systems. To determine how well an individual’s ATP-PCr system is preforming we have to look at his or hers Peak Power and Anaerobic Power values. The higher the number of each value indicates a greater ability for the subject to use phosphocreatine to phosphorylate ADP to ATP. Victor did have a higher Peak Power than Terry but that was in absolute terms. The best way to compare the two is to use Anaerobic Power. Anaerobic Power is relative to the person’s body weight thus giving a more accurate representation. The other system that this test allows us to observe is the lactic acid system. The value that will tell us how well each individual can utilize lactic acid for energy is Mean Power. This is because it is the average of the power output over the thirty seconds of the test.
3.
Many factors contribute to fatigue during anaerobic and aerobic exercises. The Wingate Test is strictly anaerobic by design. The two primary factors that can lead to fatigue during this test is depletion of the PCr system and buildup of lactic acid in the body. As the test is started the subjects body is forced to its maximum exertion level. The body’s store of creatine phosphate starts to drop at a rate that it cannot be replenished in time. This allows less ATP to be made and utilized by the muscles leading to fatigue. The other main cause of fatigue is the buildup of lactic acid in the body. As the PCr system is being depleted the body switches to glycolysis for energy and because the exercise is anaerobic the pyruvic acid produced is turned to lactic acid by the NADH and LDH enzyme. The muscles then can use this lactic acid to produce more ATP but there is a point where lactate exceeds this system and increases exponentially called the lactate threshold. This excess lactic acid can cause phosphofructokinase to be inhibited leading to fatigue of the
muscle.